1 files changed, 23 insertions, 26 deletions

diff --git a/include/asm-s390/page.h b/include/asm-s390/page.h
index fe7f92b6ae6d..f0f4579eac13 100644
--- a/include/asm-s390/page.h
+++ b/include/asm-s390/page.h
@@ -19,17 +19,34 @@
 #define PAGE_DEFAULT_ACC        0
 #define PAGE_DEFAULT_KEY        (PAGE_DEFAULT_ACC << 4)
 
+#define HPAGE_SHIFT     20
+#define HPAGE_SIZE      (1UL << HPAGE_SHIFT)
+#define HPAGE_MASK      (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER      (HPAGE_SHIFT - PAGE_SHIFT)
+
+#define ARCH_HAS_SETCLEAR_HUGE_PTE
+#define ARCH_HAS_HUGE_PTE_TYPE
+#define ARCH_HAS_PREPARE_HUGEPAGE
+#define ARCH_HAS_HUGEPAGE_CLEAR_FLUSH
+
 #include <asm/setup.h>
 #ifndef __ASSEMBLY__
 
 static inline void clear_page(void *page)
 {
-        register unsigned long reg1 asm ("1") = 0;
-        register void *reg2 asm ("2") = page;
-        register unsigned long reg3 asm ("3") = 4096;
-        asm volatile(
-                "       mvcl    2,0"
-                : "+d" (reg2), "+d" (reg3) : "d" (reg1) : "memory", "cc");
+        if (MACHINE_HAS_PFMF) {
+                asm volatile(
+                        "       .insn   rre,0xb9af0000,%0,%1"
+                        : : "d" (0x10000), "a" (page) : "memory", "cc");
+        } else {
+                register unsigned long reg1 asm ("1") = 0;
+                register void *reg2 asm ("2") = page;
+                register unsigned long reg3 asm ("3") = 4096;
+                asm volatile(
+                        "       mvcl    2,0"
+                        : "+d" (reg2), "+d" (reg3) : "d" (reg1)
+                        : "memory", "cc");
+        }
 }
 
 static inline void copy_page(void *to, void *from)
@@ -108,26 +125,6 @@ page_get_storage_key(unsigned long addr)
         return skey;
 }
 
-extern unsigned long max_pfn;
-
-static inline int pfn_valid(unsigned long pfn)
-{
-        unsigned long dummy;
-        int ccode;
-
-        if (pfn >= max_pfn)
-                return 0;
-
-        asm volatile(
-                "       lra     %0,0(%2)\n"
-                "       ipm     %1\n"
-                "       srl     %1,28\n"
-                : "=d" (dummy), "=d" (ccode)
-                : "a" (pfn << PAGE_SHIFT)
-                : "cc");
-        return !ccode;
-}
-
 #endif /* !__ASSEMBLY__ */
 
 /* to align the pointer to the (next) page boundary */